Transfer coefficients of selected radionuclides to animal products. I. Comparison of milk and meat from dairy cows and goats.

The diet-milk transfer coefficient, Fm (Bq L-1 output in milk divided by Bq d-1 intake to the animal) was studied for eight radionuclides that previously had been given little attention. The Fm values for cows and goats, respectively, were: 2.3 X 10(-5) and 1.5 X 10(-4) for 99mTc, 1.4 X 10(-4) and 8.5 X 10(-4) for 95mTc, 1.1 X 10(-2) for 99Tc (goats only); 1.7 X 10(-3) and 9 X 10(-3) for 99Mo; 4.8 X 10(-4) and 4.4 X 10(-3) for 123mTe; 4.8 X 10(-4) and 4.6 X 10(-3) for 133Ba; 5.5 X 10(-7) and 5.5 X 10(-6) for 95Zr; and 4.1 X 10(-7) and 6.4 X 10(-6) for 95Nb. The goat/cow transfer coefficient ratios for milk were approximately 10, but the goat/cow ratios for meat varied by three orders of magnitude.